Punch.



H. DENBURGER;

PUNCH. AiPLIGATlON FILEDQPR. 15.1908.

Patented Jan. 12. 1909.

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lflllllllllllll Patented Jan. 12 1909.

H. DENBURGER.

PUNCH.

APPLICATION FILED APR. 15.1903.

HERMAN DENBURGER, OF EAST ORANGE, NEW JERSEY.

PUNCH.

Specification of Letters Patent.-

Patented Jan. 12, 1909.

Application filed April 15, 1908. Serial No. 427,146.

To all whom it may concern:

Be it known that I, HERMAN DENBURGER, a citizen of the United States,residing at East Orange, in the county of Essex and State of New Jersey,have invented certain new and useful Improvements in Punches, of whichthe following is a specification.

This invention relates to perforating machines, and particularly to suchas are used for punching holes in the margins of sheets ifcir loose leafbooks, letters for files, and the ice.

The object of the invention is to produce an improved device of thekind, capable of use with one or more punches, and in which the punchescan be readily removed or changed so as to punch holes of various sizesor shapes, whereby the machine will be adapted for any kind of work. Themeans for changing the punches are such that it may be very quicklydone, without the use of tools, and a further feature is that thepunches when put in place may be adjusted to any desired position, andthe holes punched accordingly.

The invention is illustrated in the accompanying drawings in which-Figure 1 is a plan of the machine. Fig. 2 is a front elevation. Fig. 3is a cross section on the line 3-3 of Fig. 1. Fig. 1 is an end viewshowing the clamp for the gage rod.

Referring specifically to the drawings, 6 indicates a, base which may bemade hollow if desired, to form a box or casing to receive thepunchings, and the top surface has a slot 7 through which the punchingsdrop into the box below. Fastened to the top of the base, along the rearedge of the slot, is a plate 8 the ends of which are bent up to formstandards 9. A rock shaft 10 is supported between the standards uponeccentric pivot screws 11, forming in effect a long eccentric which isprovided with a handle 12 and which operates the punches.

, Each punch is mounted in a holder consisting of a base or bottom piece14 which is forked at the front end as at 15 to receive the margin ofthe sheet 01' sheets to be punched. The punch 16 works through holes ordies in said forks, and said punch is pivoted at its upper end, as at 17to a swinging arm 18 which is hinged at its rear end, as at 19, to thebase plate or piece. The arm 18 and the punch carried thereby arenormally lifted by a spring 20 coiled around a screw 21 the head ofwhich acts as a stop for the lift of the arm. The shape or size of thepunch may be varied as desired, each separate punch being mounted orsupported in its own holder, and when new punches are to be used theholders are bodily removed, and new ones substituted.

The base piece 1 1 of each holder is provided with openings to receive arod 23 and a bar 2 1, both of which extend through alined holes in thestandards 9. The rod 23 and bar 2 1 may be pulled out lengthwise toremove or replace the punch holder. When. the punch holders are in placeon the rod and the bar the arms 18 project under the roller 10, and whensaid roller is turned by means of the handle the punches are presseddown through the sheets in the forks of the holders. The holders may beslid along the bar 23 to any desired position, and when properly locatedare held in place by means of a cam clamp 25 which has legs 26 whichstraddle the rear end of the holder, said legs being provided with holesthrough which the rod 23 extends, and with cam surfaces 26 which whenthe clamp is pressed down bear against the plate 8 and so cause a bindwhich prevents the clamp from moving and consequently holds the punchholder in place.

In addition to its function of holding the punch holders in place thesliding bar 24 acts as a gage, having a forwardly extending linger 30 atone end, and the bar may be shifted lengthwise to bring this fingercloser to or farther from the punches, and said finger will act as agage for the edge of the sheets. Vt hen properly set the gage may befixed by means of a cam clamp 31 pivoted to the adjacent side of one ofthe standards 9.

When the punch holders are in position, as described, the jaws or forksat the front end thereof project over the slot 7 and the top surface ofthe lower jaw is preferably flush with the surface of the base or table,whereby papers can be readily slipped in under the punches, the frontend of the lower jaw resting in a rabbet 32- formed along the front edgeof the slot 7. Said edge may be also provided with a scale of inches 33to enable the punches to be properly located.

Obviously one, two or more punch holders may be put in place upon thebars 23 and 24, and hence any desired number of holes can be punched atone operation. This adapts the machine for work of various kinds, sothat it may be used to punch sheets for various types of loose leafbooks, as well as for punching letters to receive eyelets,

filing devices and the like. It requires but a moment to change theunches, since all that has to be done is to oosen the clamps 25 and 31pull out the rods 23 and 24 far enough to allow the punch holders to beclipped H and new ones substituted, after which the rods are pushed inand fastened and the punch holders clamped at adjustment.

I claim: 1. In a punching machine, the combination of a base andstandards thereon, a bar access to the base piece and extending over thejaws, and a punch pivoted at its upper end to the front end of the armand adapted to work through the holes in the jaws. 3. In a unchingmachine, the combination of a ame, a plurality of removable punchholders mounted in alinement therein, each punch holder having a lowerfixed piece and a swinging upper piece carrying the punch, and aneccentric shaft extending across above the said upper pieces and in lineabove the punches carried thereby and adapted when turned to depress thesame and force the punches through sheets on the lower piece. 7

In testimony whereof I afiix my signature, in presence of two witnesses.

HERMAN DENBURGER. Witnesses:

F. H. BURLEW, WILLIAM A. FORRESTER.

